Oscillating mass



FIG. 1 is a front perspective view of an oscillating mass showing my newdesign;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a left side view thereof.

The portions of the oscillating mass shown in broken lines form no partof the claimed design.

CLAIM The ornamental design for an oscillating mass, as shown anddescribed.